US20140268624A1 - Carrier for mounting a piezoelectric device on a circuit board and method for mounting a piezoelectric device on a circuit board - Google Patents
Carrier for mounting a piezoelectric device on a circuit board and method for mounting a piezoelectric device on a circuit board Download PDFInfo
- Publication number
- US20140268624A1 US20140268624A1 US13/833,614 US201313833614A US2014268624A1 US 20140268624 A1 US20140268624 A1 US 20140268624A1 US 201313833614 A US201313833614 A US 201313833614A US 2014268624 A1 US2014268624 A1 US 2014268624A1
- Authority
- US
- United States
- Prior art keywords
- carrier
- metal contacts
- crystal device
- piezoelectric crystal
- carrier bottom
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000010897 surface acoustic wave method Methods 0.000 claims abstract description 61
- 239000002184 metal Substances 0.000 claims abstract description 29
- 229910052751 metal Inorganic materials 0.000 claims abstract description 29
- 238000005520 cutting process Methods 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 238000001746 injection moulding Methods 0.000 claims description 5
- 238000003698 laser cutting Methods 0.000 claims description 2
- 239000013078 crystal Substances 0.000 claims 20
- 238000003780 insertion Methods 0.000 abstract 1
- 230000037431 insertion Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 6
- HHXNVASVVVNNDG-UHFFFAOYSA-N 1,2,3,4,5-pentachloro-6-(2,3,6-trichlorophenyl)benzene Chemical compound ClC1=CC=C(Cl)C(C=2C(=C(Cl)C(Cl)=C(Cl)C=2Cl)Cl)=C1Cl HHXNVASVVVNNDG-UHFFFAOYSA-N 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 208000035473 Communicable disease Diseases 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 206010057040 Temperature intolerance Diseases 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000003124 biologic agent Substances 0.000 description 1
- 239000012620 biological material Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008543 heat sensitivity Effects 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000026683 transduction Effects 0.000 description 1
- 238000010361 transduction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- H01L41/053—
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/05—Holders; Supports
- H03H9/058—Holders; Supports for surface acoustic wave devices
-
- H01L41/311—
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/301—Assembling printed circuits with electric components, e.g. with resistor by means of a mounting structure
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10007—Types of components
- H05K2201/10083—Electromechanical or electro-acoustic component, e.g. microphone
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10227—Other objects, e.g. metallic pieces
- H05K2201/10424—Frame holders
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10613—Details of electrical connections of non-printed components, e.g. special leads
- H05K2201/10954—Other details of electrical connections
- H05K2201/10962—Component not directly connected to the PCB
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
- H05K3/341—Surface mounted components
- H05K3/3421—Leaded components
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/4913—Assembling to base an electrical component, e.g., capacitor, etc.
Definitions
- the invention relates generally to piezoelectric devices, and in particular, to a method of mounting piezoelectric devices on a circuit board and a mounting arrangement for a piezoelectric device.
- Piezoelectric devices have a wide range of uses in science and industry.
- One exemplary application of a piezoelectric device is a surface acoustic wave (SAW) device.
- SAW devices may be used, for example, as filters, oscillators and transformers, all of which are devices that are based on the transduction of acoustic waves.
- SAW devices are generally constructed using a crystalline piezoelectric material which has necessary properties to produce a surface acoustic wave when the device input is stimulated using an electronic signal.
- Electronic devices including SAW devices therein will include one or more interdigital transducers (IDTs) to convert the surface acoustic waves to electrical signals (and vice versa), relying on the piezoelectric effect of the crystalline piezoelectric material.
- IDTs interdigital transducers
- One common application of SAW devices is in mobile phones.
- SAW devices may also be used as sensors in many areas, including, for example, chemical, optical, thermal, pressure, acceleration, torque and biological.
- One particular use of SAW devices as a sensor involves the application of a bio-coating to the SAW device to enable the device to detect the presence of biological agents, such as particular viruses and bacteria.
- SAW technology could be used, for example, to produce an infectious disease detection cartridge, and in one instance this detection cartridge may be low-cost enough to be disposable.
- a particular challenge in this regard, however, is how to interface, mechanically and electrically, to the sensor itself.
- wire bonding e.g., welding.
- a bio-coated SAW device is sensitive to heat. While a SAW device, generally, is not heat sensitive, coatings incorporating such biological materials may be damaged by exposure to high temperatures.
- Wire bonding which as mentioned is conventionally used for other SAW devices, involves steps that would heat the device to an unacceptable degree in the context of a biosensor. Thus, wire bonding cannot be used for mounting a bio-coated SAW device to the circuit board.
- piezoelectric devices in general are, by their nature, sensitive to mechanical stress. Stress induced by mechanical contact during mounting must be minimized. Also, a reliable, low-loss connection is needed for the radio frequency (RF) signal input and output from the device. Of course, any successful commercialization requires the mounting method to be low cost as well.
- RF radio frequency
- FIGS. 1A-1C show a method of manufacturing a plurality of metal contacts for a carrier for mounting a SAW device, in accordance with a disclosed embodiment.
- FIGS. 2A-2D show a method of assembling a bottom carrier portion of a carrier for mounting a SAW device, in accordance with a disclosed embodiment.
- FIG. 3 is a cutaway view of a portion of a carrier for mounting a SAW device, in accordance with a disclosed embodiment.
- FIG. 4 shows a carrier lid portion of a carrier for mounting a SAW device, in accordance with a disclosed embodiment.
- FIG. 5 is an exploded view of a carrier for mounting a SAW device as mounted on a circuit board, in accordance with a disclosed embodiment.
- FIG. 6 is a cutaway view of a carrier for mounting a SAW device, in accordance with a disclosed embodiment.
- FIG. 7 is an annotated view of a bottom carrier portion of a carrier for mounting a SAW device, in accordance with a disclosed embodiment.
- FIG. 6 is a cutaway view of a carrier 500 of an exemplary embodiment including a SAW device 100 mounted therein. As discussed below in more detail, this carrier 500 is mounted on a printed circuit board (PCB) 200 ( FIG. 5 ), providing a spring-loaded connection to, and thus electrical communication with, the SAW device 100 .
- PCB printed circuit board
- the contacts 11 may be fabricated from a single sheet of sheet metal, out of which a flat pattern 15 that remains connected by a perimeter frame 12 (e.g., a lead frame) is formed.
- the initial flat pattern 15 for forming contacts 11 may be cut using any suitable cutting method, such as laser cutting, cutting using a wire Electron Discharge Machine (EDM), or die cutting.
- EDM Electron Discharge Machine
- a die cutting process is particularly well suited to low-cost mass production.
- the sheet metal from which frame 12 and flat pattern 15 is cut may be, for example, copper sheet or a copper alloy.
- the flat pattern 15 is then die-formed, as shown in FIG. 1B , to present formed component 16 , including a set of finger-like contacts 11 .
- formed component 16 including a set of finger-like contacts 11 .
- each contact 11 remains connected by the frame 12 .
- the frame 12 will be cut off and removed, leaving only the contacts 11 , as seen in FIG. 1C .
- the frame 12 maintains the correct orientation and spacing of the contacts 11 until they are encapsulated in plastic 18 .
- the plastic 18 may be formed either by overmolding, using for example injection molding (resulting in FIG. 2C ), or fabricated using pre-formed plastic pieces 18 a , 18 b , 18 c , that are attached with adhesive after the frame 12 is dropped into grooves 19 a , 19 b formed in piece 18 a (as shown in FIGS. 2A-2C ).
- the frame 12 may also include additional alignment features 12 a / 12 b (see, FIG. 1A ) that help to precisely position the contacts 11 with respect to the electrical pads 115 on the SAW device 100 (see, FIG. 3 ).
- the alignment features 12 a / 12 b ensure accurate alignment and electrical connection between the contacts 11 and what may be relatively small electrical pads 115 .
- the features 12 a serve to align the frame 12 to plastic 18 in the x-axis (see. FIG. 2C ).
- the features 12 b serve to align the frame 12 to plastic 18 in the y-axis (see, FIG. 2C ).
- the alignment features could be modified to align the frame 12 to the tooling used for injection molding as well.
- the alignment features could include a set of holes added to the frame 12 , allowing it to slide over a corresponding set of pins protruding from the tooling. This would precisely align the frame 12 to the injection molding tooling.
- the frame 12 is then removed to form the bottom 20 of the carrier 500 ( FIG. 6 ), which includes formed plastic 18 and contacts 11 , as shown in FIG. 2D .
- the contacts 11 are captured in plastic 18 and are arranged to correspond with and contact each electrical pad 115 of the SAW device 100 .
- FIG. 6 shows that the contacts 11 are captured in plastic 18 and are arranged to correspond with and contact each electrical pad 115 of the SAW device 100 .
- each contact 11 generally, includes a central flat portion 11 a , which extends through the side of the carrier bottom 20 , two angled portions 11 b , 11 c , angling away from the central flat portion 11 a in opposite directions relative to a top plane of the carrier bottom 20 , flat end portion 23 for connection to a PCB 200 and cantilevered ends 22 for contacting the electrical pads 115 of the SAW device 100 .
- the assembly When a SAW device 100 is inserted into the carrier bottom 20 , the assembly functions as shown in the cutaway shown in FIG. 3 .
- the contacts 11 protrude through the carrier bottom 20 , and cantilevered ends 22 provide a spring-loaded connection to each electrical pad 115 of the SAW device 100 .
- the opposite end 23 of the contacts 11 may be formed in the same manner as the leads of a standard surface mounted IC. These ends 23 of the contacts 11 can be soldered to a matching footprint on a printed circuit board (PCB) 200 , in a conventional manner, as shown in FIG. 5 .
- PCB printed circuit board
- the carrier bottom 20 is soldered to the PCB 200 before the SAW device 100 is placed into the assembly.
- a lid 30 retains the SAW device 100 within the carrier bottom 20 .
- Lid 30 applies appropriate pressure to cause the cantilevered ends 22 of the contacts 11 to become spring-loaded and pressed against the electrical pads 115 of the SAW device 100 .
- the lid 30 will not damage the device upon installation. This can be done as shown in FIG. 7 , by making the indicated area 25 deeper than the thickness of the SAW device 100 .
- the tips of contacts 11 must also be located below the top surface of the plastic 18 .
- This configuration results in the SAW device 100 registering against the indicated areas 26 , such that a bottom surface of the SAW device 100 is below a top plane of the carrier bottom 20 (see, FIGS. 3 , 6 ).
- the SAW device 100 when the SAW device 100 is inserted into the carrier bottom 20 , it is at least partially recessed such that the SAW device 100 cannot slide sideways prior to installation of the lid 30 .
- the SAW device 100 will be appropriately positioned when the lid 30 is installed, such that the lid 30 will not damage the SAW device 100 upon assembly.
- Pressure is applied evenly across the SAW device 100 with a raised area 32 , or boss, formed on the underside of the lid 30 .
- the shape of boss 32 substantially corresponds to the shape of the SAW device 100 .
- the boss 32 is a rectangular raised portion that is circumscribed around the electrical pads 115 on the SAW device 100 .
- the entire assembly comes together as shown in the cutaway view of FIG. 6 .
- the boss 32 on the underside of the lid 30 allows the lid 30 to seat against a top plane of the carrier bottom 20 while still pressing the SAW device 100 down to the proper depth so that the contacts 11 are flexed to an appropriate degree to maintain steady and reliable contact with the electrical pads 115 of the SAW device 100 .
- the lid 30 may be attached to the carrier bottom 20 using integral molded snap hooks, each formed of a socket portion 37 formed in lid 30 and a corresponding hook portion 27 formed on carrier bottom 20 (or vice versa), as seen in FIG. 5 .
- lid 30 may be attached using adhesive or screws to connect lid 30 to carrier bottom 20 .
- the carrier device 500 can be manufactured reliably and at a low-cost.
Abstract
Description
- The invention relates generally to piezoelectric devices, and in particular, to a method of mounting piezoelectric devices on a circuit board and a mounting arrangement for a piezoelectric device.
- Piezoelectric devices have a wide range of uses in science and industry. One exemplary application of a piezoelectric device is a surface acoustic wave (SAW) device. Such SAW devices may be used, for example, as filters, oscillators and transformers, all of which are devices that are based on the transduction of acoustic waves. SAW devices are generally constructed using a crystalline piezoelectric material which has necessary properties to produce a surface acoustic wave when the device input is stimulated using an electronic signal. Electronic devices including SAW devices therein, will include one or more interdigital transducers (IDTs) to convert the surface acoustic waves to electrical signals (and vice versa), relying on the piezoelectric effect of the crystalline piezoelectric material. One common application of SAW devices is in mobile phones.
- SAW devices may also be used as sensors in many areas, including, for example, chemical, optical, thermal, pressure, acceleration, torque and biological. One particular use of SAW devices as a sensor involves the application of a bio-coating to the SAW device to enable the device to detect the presence of biological agents, such as particular viruses and bacteria. SAW technology could be used, for example, to produce an infectious disease detection cartridge, and in one instance this detection cartridge may be low-cost enough to be disposable. A particular challenge in this regard, however, is how to interface, mechanically and electrically, to the sensor itself.
- One method of making an electrical connection to a piezoelectric device is wire bonding, e.g., welding. However, when mounting piezoelectric devices, and in particular a bio coated SAW device, to a circuit board, there are several considerations which must be addressed. For example, a bio-coated SAW device is sensitive to heat. While a SAW device, generally, is not heat sensitive, coatings incorporating such biological materials may be damaged by exposure to high temperatures. Wire bonding, which as mentioned is conventionally used for other SAW devices, involves steps that would heat the device to an unacceptable degree in the context of a biosensor. Thus, wire bonding cannot be used for mounting a bio-coated SAW device to the circuit board. Further, piezoelectric devices in general are, by their nature, sensitive to mechanical stress. Stress induced by mechanical contact during mounting must be minimized. Also, a reliable, low-loss connection is needed for the radio frequency (RF) signal input and output from the device. Of course, any successful commercialization requires the mounting method to be low cost as well.
- Accordingly, there is a need and desire for a low-cost, reliable method of mounting piezoelectric devices, and in particular a bio-coated SAW device, e.g., a biosensor, on a PC board.
-
FIGS. 1A-1C show a method of manufacturing a plurality of metal contacts for a carrier for mounting a SAW device, in accordance with a disclosed embodiment. -
FIGS. 2A-2D show a method of assembling a bottom carrier portion of a carrier for mounting a SAW device, in accordance with a disclosed embodiment. -
FIG. 3 is a cutaway view of a portion of a carrier for mounting a SAW device, in accordance with a disclosed embodiment. -
FIG. 4 shows a carrier lid portion of a carrier for mounting a SAW device, in accordance with a disclosed embodiment. -
FIG. 5 is an exploded view of a carrier for mounting a SAW device as mounted on a circuit board, in accordance with a disclosed embodiment. -
FIG. 6 is a cutaway view of a carrier for mounting a SAW device, in accordance with a disclosed embodiment. -
FIG. 7 is an annotated view of a bottom carrier portion of a carrier for mounting a SAW device, in accordance with a disclosed embodiment. - In the following detailed description, reference is made to the accompanying drawings, which form a part hereof and illustrate specific embodiments that may be practiced. In the drawings, like reference numerals describe substantially similar components throughout the several views. These embodiments are described in sufficient detail to enable those skilled in the art to practice them, and it is to be understood that structural and logical changes may be made. The sequences of steps are not limited to those set forth herein and may be changed or reordered, with the exception of steps necessarily occurring in a certain order.
- The disclosed embodiments relate to a method of mounting a piezoelectric device on a printed circuit board (PCB). In the example embodiments described herein, a bio-coated SAW device is referenced and shown, however, it should be understood that the method may be used for mounting any type of piezoelectric device on a printed circuit board (PCB).
FIG. 6 is a cutaway view of acarrier 500 of an exemplary embodiment including aSAW device 100 mounted therein. As discussed below in more detail, thiscarrier 500 is mounted on a printed circuit board (PCB) 200 (FIG. 5 ), providing a spring-loaded connection to, and thus electrical communication with, theSAW device 100. - Referring to
FIGS. 1A-1C , one method of forming spring-loadedcontacts 11 for such acarrier 500 is now described. As seen inFIG. 1A , the contacts 11 (FIG. 1C ) may be fabricated from a single sheet of sheet metal, out of which aflat pattern 15 that remains connected by a perimeter frame 12 (e.g., a lead frame) is formed. The initialflat pattern 15 for formingcontacts 11 may be cut using any suitable cutting method, such as laser cutting, cutting using a wire Electron Discharge Machine (EDM), or die cutting. A die cutting process is particularly well suited to low-cost mass production. The sheet metal from whichframe 12 andflat pattern 15 is cut may be, for example, copper sheet or a copper alloy. Theflat pattern 15 is then die-formed, as shown inFIG. 1B , to present formedcomponent 16, including a set of finger-like contacts 11. There is onecontact 11 for each electrical pad 115 (FIG. 3 ) of theSAW device 100. At this point in the process, eachcontact 11 remains connected by theframe 12. In a later step theframe 12 will be cut off and removed, leaving only thecontacts 11, as seen inFIG. 1C . - Referring to
FIGS. 2A-2D , an example embodiment in which the formedcomponent 16 is encapsulated inplastic 18 before cutting away theframe 12 is now described. In this instance, theframe 12 maintains the correct orientation and spacing of thecontacts 11 until they are encapsulated inplastic 18. The plastic 18 may be formed either by overmolding, using for example injection molding (resulting inFIG. 2C ), or fabricated using pre-formedplastic pieces frame 12 is dropped intogrooves piece 18 a (as shown inFIGS. 2A-2C ). - In either case (overmolding or fabrication), the
frame 12 may also include additional alignment features 12 a/12 b (see,FIG. 1A ) that help to precisely position thecontacts 11 with respect to theelectrical pads 115 on the SAW device 100 (see,FIG. 3 ). The alignment features 12 a/12 b ensure accurate alignment and electrical connection between thecontacts 11 and what may be relatively smallelectrical pads 115. For example, thefeatures 12 a serve to align theframe 12 toplastic 18 in the x-axis (see.FIG. 2C ). Likewise, thefeatures 12 b serve to align theframe 12 toplastic 18 in the y-axis (see,FIG. 2C ). The alignment features could be modified to align theframe 12 to the tooling used for injection molding as well. For example, the alignment features could include a set of holes added to theframe 12, allowing it to slide over a corresponding set of pins protruding from the tooling. This would precisely align theframe 12 to the injection molding tooling. - After the plastic 18 is in place over the
contacts 11, theframe 12 is then removed to form the bottom 20 of the carrier 500 (FIG. 6 ), which includes formed plastic 18 andcontacts 11, as shown inFIG. 2D . As seen inFIG. 2D andFIG. 3 , thecontacts 11 are captured inplastic 18 and are arranged to correspond with and contact eachelectrical pad 115 of theSAW device 100. As seen inFIG. 3 , the shape of eachcontact 11, generally, includes a centralflat portion 11 a, which extends through the side of thecarrier bottom 20, twoangled portions flat portion 11 a in opposite directions relative to a top plane of thecarrier bottom 20,flat end portion 23 for connection to aPCB 200 and cantilevered ends 22 for contacting theelectrical pads 115 of theSAW device 100. - When a
SAW device 100 is inserted into thecarrier bottom 20, the assembly functions as shown in the cutaway shown inFIG. 3 . Thecontacts 11 protrude through thecarrier bottom 20, and cantilevered ends 22 provide a spring-loaded connection to eachelectrical pad 115 of theSAW device 100. Theopposite end 23 of thecontacts 11 may be formed in the same manner as the leads of a standard surface mounted IC. These ends 23 of thecontacts 11 can be soldered to a matching footprint on a printed circuit board (PCB) 200, in a conventional manner, as shown inFIG. 5 . In order to avoid damage to theSAW device 100 during soldering, thecarrier bottom 20 is soldered to thePCB 200 before theSAW device 100 is placed into the assembly. - To complete the
carrier 500, a lid 30 (FIGS. 4-6 ) retains theSAW device 100 within thecarrier bottom 20.Lid 30 applies appropriate pressure to cause the cantilevered ends 22 of thecontacts 11 to become spring-loaded and pressed against theelectrical pads 115 of theSAW device 100. When theSAW device 100 is inserted intocarrier bottom 20, it must be installed such that thelid 30 will not damage the device upon installation. This can be done as shown inFIG. 7 , by making the indicatedarea 25 deeper than the thickness of theSAW device 100. The tips ofcontacts 11 must also be located below the top surface of the plastic 18. This configuration results in theSAW device 100 registering against the indicatedareas 26, such that a bottom surface of theSAW device 100 is below a top plane of the carrier bottom 20 (see,FIGS. 3 , 6). In other words, when theSAW device 100 is inserted into thecarrier bottom 20, it is at least partially recessed such that theSAW device 100 cannot slide sideways prior to installation of thelid 30. In this way, theSAW device 100 will be appropriately positioned when thelid 30 is installed, such that thelid 30 will not damage theSAW device 100 upon assembly. Pressure is applied evenly across theSAW device 100 with a raisedarea 32, or boss, formed on the underside of thelid 30. The shape ofboss 32 substantially corresponds to the shape of theSAW device 100. In particular, theboss 32 is a rectangular raised portion that is circumscribed around theelectrical pads 115 on theSAW device 100. The entire assembly comes together as shown in the cutaway view ofFIG. 6 . Theboss 32 on the underside of thelid 30 allows thelid 30 to seat against a top plane of thecarrier bottom 20 while still pressing theSAW device 100 down to the proper depth so that thecontacts 11 are flexed to an appropriate degree to maintain steady and reliable contact with theelectrical pads 115 of theSAW device 100. Thelid 30 may be attached to thecarrier bottom 20 using integral molded snap hooks, each formed of asocket portion 37 formed inlid 30 and acorresponding hook portion 27 formed on carrier bottom 20 (or vice versa), as seen inFIG. 5 . Alternatively,lid 30 may be attached using adhesive or screws to connectlid 30 tocarrier bottom 20. - Since the final assembly of the
SAW device 100 into the carrier 500 (seeFIG. 6 ) is performed after thecarrier bottom 20 is already attached to thecircuit board 200, the problem of heat sensitivity for bio-coated SAW devices may be avoided. The sensitivity to bending is mitigated with the low force of the spring leads 22 ofcontacts 11 in conjunction with the fact that the leads 22 are pressing on theSAW device 100 in an area supported by theboss 32 on the underside of the lid 30 (see, e.g.,FIG. 6 ). This support from the lid minimizes flexural forces in the SAW. Finally, since the design can be created with a combination of die-stamping and plastic injection molding, which are processes developed for and ideally suited to low-cost, reliable mass production, thecarrier device 500 can be manufactured reliably and at a low-cost. - The foregoing discussion merely illustrates the principles of the invention. Although the invention may be used to particular advantage in the context of medical device design and manufacture, those skilled in the art will be able to incorporate the invention into other piezoelectric device applications. It will thus be appreciated that those skilled in the art will be able to devise numerous alternative arrangements that, while not shown or described herein, embody the principles of the invention and thus are within its spirit and scope.
Claims (23)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/833,614 US9270251B2 (en) | 2013-03-15 | 2013-03-15 | Carrier for mounting a piezoelectric device on a circuit board and method for mounting a piezoelectric device on a circuit board |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/833,614 US9270251B2 (en) | 2013-03-15 | 2013-03-15 | Carrier for mounting a piezoelectric device on a circuit board and method for mounting a piezoelectric device on a circuit board |
Publications (2)
Publication Number | Publication Date |
---|---|
US20140268624A1 true US20140268624A1 (en) | 2014-09-18 |
US9270251B2 US9270251B2 (en) | 2016-02-23 |
Family
ID=51526193
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/833,614 Expired - Fee Related US9270251B2 (en) | 2013-03-15 | 2013-03-15 | Carrier for mounting a piezoelectric device on a circuit board and method for mounting a piezoelectric device on a circuit board |
Country Status (1)
Country | Link |
---|---|
US (1) | US9270251B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160134255A1 (en) * | 2014-11-11 | 2016-05-12 | Corechips Co., Ltd. | Surface acoustic wave device and apparatus including the same |
US20220091270A1 (en) * | 2020-09-21 | 2022-03-24 | GM Global Technology Operations LLC | Vehicle-integrated lidar system |
US11531043B2 (en) * | 2018-05-11 | 2022-12-20 | Advantest Corporation | Test carrier and carrier assembling apparatus |
Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3877064A (en) * | 1974-02-22 | 1975-04-08 | Amp Inc | Device for connecting leadless integrated circuit packages to a printed-circuit board |
US4330163A (en) * | 1979-12-05 | 1982-05-18 | E. I. Du Pont De Nemours And Company | Zero insertion force connector for LSI circuit package |
US4390220A (en) * | 1981-04-02 | 1983-06-28 | Burroughs Corporation | Electrical connector assembly for an integrated circuit package |
US4641176A (en) * | 1981-01-26 | 1987-02-03 | Burroughs Corporation | Semiconductor package with contact springs |
US4918513A (en) * | 1987-06-05 | 1990-04-17 | Seiko Epson Corporation | Socket for an integrated circuit chip carrier and method for packaging an integrated circuit chip |
US5696422A (en) * | 1996-03-01 | 1997-12-09 | Piezo Crystal Company | Crystal package |
US20020043890A1 (en) * | 2000-07-13 | 2002-04-18 | Rutgers, The State University Of New Jersey | Integrated tunable surface acoustic wave technology and sensors provided thereby |
US6695624B1 (en) * | 2002-11-29 | 2004-02-24 | Hon Hai Precision Ind. Co., Ltd. | Electrical contacts used in an electrical connector |
US20040207059A1 (en) * | 2003-04-17 | 2004-10-21 | Hong Chu Wan | Package structure with a cavity |
US20040217670A1 (en) * | 2003-04-08 | 2004-11-04 | Masanori Ueda | Surface acoustic wave device and method of fabricating the same |
US6913468B2 (en) * | 1993-11-16 | 2005-07-05 | Formfactor, Inc. | Methods of removably mounting electronic components to a circuit board, and sockets formed by the methods |
US20060150381A1 (en) * | 2003-06-03 | 2006-07-13 | Toyo Communication Equipment Co., Ltd. | Saw device manufacturing method |
US7078799B2 (en) * | 2003-04-29 | 2006-07-18 | Stmicroelectronics S.A. | Semiconductor package |
US7427822B2 (en) * | 2004-05-12 | 2008-09-23 | Daishinku Corporation | Piezoelectric resonator element package, and piezoelectric resonator |
-
2013
- 2013-03-15 US US13/833,614 patent/US9270251B2/en not_active Expired - Fee Related
Patent Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3877064A (en) * | 1974-02-22 | 1975-04-08 | Amp Inc | Device for connecting leadless integrated circuit packages to a printed-circuit board |
US4330163A (en) * | 1979-12-05 | 1982-05-18 | E. I. Du Pont De Nemours And Company | Zero insertion force connector for LSI circuit package |
US4641176A (en) * | 1981-01-26 | 1987-02-03 | Burroughs Corporation | Semiconductor package with contact springs |
US4390220A (en) * | 1981-04-02 | 1983-06-28 | Burroughs Corporation | Electrical connector assembly for an integrated circuit package |
US4918513A (en) * | 1987-06-05 | 1990-04-17 | Seiko Epson Corporation | Socket for an integrated circuit chip carrier and method for packaging an integrated circuit chip |
US6913468B2 (en) * | 1993-11-16 | 2005-07-05 | Formfactor, Inc. | Methods of removably mounting electronic components to a circuit board, and sockets formed by the methods |
US5696422A (en) * | 1996-03-01 | 1997-12-09 | Piezo Crystal Company | Crystal package |
US20020043890A1 (en) * | 2000-07-13 | 2002-04-18 | Rutgers, The State University Of New Jersey | Integrated tunable surface acoustic wave technology and sensors provided thereby |
US6695624B1 (en) * | 2002-11-29 | 2004-02-24 | Hon Hai Precision Ind. Co., Ltd. | Electrical contacts used in an electrical connector |
US20040217670A1 (en) * | 2003-04-08 | 2004-11-04 | Masanori Ueda | Surface acoustic wave device and method of fabricating the same |
US20040207059A1 (en) * | 2003-04-17 | 2004-10-21 | Hong Chu Wan | Package structure with a cavity |
US7078799B2 (en) * | 2003-04-29 | 2006-07-18 | Stmicroelectronics S.A. | Semiconductor package |
US20060150381A1 (en) * | 2003-06-03 | 2006-07-13 | Toyo Communication Equipment Co., Ltd. | Saw device manufacturing method |
US7427822B2 (en) * | 2004-05-12 | 2008-09-23 | Daishinku Corporation | Piezoelectric resonator element package, and piezoelectric resonator |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160134255A1 (en) * | 2014-11-11 | 2016-05-12 | Corechips Co., Ltd. | Surface acoustic wave device and apparatus including the same |
US11531043B2 (en) * | 2018-05-11 | 2022-12-20 | Advantest Corporation | Test carrier and carrier assembling apparatus |
US20220091270A1 (en) * | 2020-09-21 | 2022-03-24 | GM Global Technology Operations LLC | Vehicle-integrated lidar system |
Also Published As
Publication number | Publication date |
---|---|
US9270251B2 (en) | 2016-02-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10115544B2 (en) | Singulated keyboard assemblies and methods for assembling a keyboard | |
US7949142B2 (en) | Silicon condenser microphone having additional back chamber and sound hole in PCB | |
US20100032189A1 (en) | Led package and attachment structure of molded circuit component | |
US9270251B2 (en) | Carrier for mounting a piezoelectric device on a circuit board and method for mounting a piezoelectric device on a circuit board | |
KR100722689B1 (en) | Silicon condenser microphone having additional back chamber | |
KR100675027B1 (en) | Silicon based condenser microphone and mounting method for the same | |
JP5016140B2 (en) | Electronic sensor or sensor device having a chip module mounted in a sensor casing, in particular an acceleration sensor | |
JP5553700B2 (en) | Package manufacturing method | |
KR100830138B1 (en) | Conductive contact holder, conductive contact unit and process for producing conductive contact holder | |
JP4658627B2 (en) | Pressure detection device package, pressure detection device, and pressure detection device manufacturing method | |
KR20110024210A (en) | Piezoelectric element and piezoelectric buzzer and piezoelectric buzzer module using thereof and fabrication method thereof | |
JP2016507738A (en) | Support elements for clock sensors | |
JP2019095387A (en) | Flowmeter | |
KR100644991B1 (en) | Surface mounting type electret condenser microphone and method of manufacturing the same | |
JP2002168713A (en) | Pressure sensor and manufacturing method thereof | |
JP2004069555A (en) | Pressure sensor and manufacturing method thereof | |
RU2013104933A (en) | ULTRASONIC SENSOR FOR VALUABLE DOCUMENTS, A CONVERTER MODULE FOR IT AND A METHOD FOR PRODUCING AN ULTRASONIC SENSOR | |
JP2001196719A (en) | Component stage for chip component | |
JP2015152577A (en) | Connecting connector and manufacturing method of connecting connector | |
KR100518116B1 (en) | Assembly of microphone holder and Manufacturing method thereof | |
JP3044460U (en) | Piezoelectric acoustic components and devices | |
JP2013239363A (en) | High-frequency switch connector, and method of manufacturing the same | |
JP5376491B2 (en) | Manufacturing method of electronic component package | |
JP2012051605A (en) | Transfer device | |
JP2002111169A (en) | Chip element |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ADAPTIVE METHODS, INC., MARYLAND Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:OWEN, PETER;ZEGLIN, CONRAD;ROMAN, BARCLAY;AND OTHERS;REEL/FRAME:030167/0043 Effective date: 20130329 |
|
ZAAA | Notice of allowance and fees due |
Free format text: ORIGINAL CODE: NOA |
|
ZAAB | Notice of allowance mailed |
Free format text: ORIGINAL CODE: MN/=. |
|
ZAAA | Notice of allowance and fees due |
Free format text: ORIGINAL CODE: NOA |
|
ZAAA | Notice of allowance and fees due |
Free format text: ORIGINAL CODE: NOA |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
FEPP | Fee payment procedure |
Free format text: ENTITY STATUS SET TO UNDISCOUNTED (ORIGINAL EVENT CODE: BIG.) |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 4 |
|
AS | Assignment |
Owner name: L3 TECHNOLOGIES, INC., VIRGINIA Free format text: MERGER AND CHANGE OF NAME;ASSIGNORS:L3 ADAPTIVE METHODS, INC.;L3 TECHNOLOGIES, INC.;REEL/FRAME:049930/0885 Effective date: 20190624 Owner name: L3 ADAPTIVE METHODS, INC., VIRGINIA Free format text: CHANGE OF NAME;ASSIGNOR:ADAPTIVE METHODS, INC.;REEL/FRAME:049931/0390 Effective date: 20170927 |
|
FEPP | Fee payment procedure |
Free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
LAPS | Lapse for failure to pay maintenance fees |
Free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |